Kate Forbes still standing despite controversy
Ash Regan the outsider at 4/1
Humaz Yousaf was the 1/2 favourite after it was confirmed that three candidates will take part in the contest to succeed Nicola Sturgeon as SNP leader and first minister of Scotland.
Yousaf, along with fellow MSPs Kate Forbes 7/2 and Ash Regan 4/1, received the 100 nominations from at least 20 local party branches that candidates required to take part.
The winner will be announced on 27 March and, between now and then, all three have plenty of work to do.
Yousaf odds-on but Forbes topped poll
Yousaf cannot afford to become complacent while Forbes must find a way to move her campaign on from its difficult start.
Regan, meanwhile, needs to gain ground on her opponents who are far ahead of her in the betting and polling.
This week, the 32-year-old caused outrage, and lost support for her leadership bid, when she said that, according to her relgious beliefs, as a member of the evangelical Free Church of Scotland, having children outside marriage was "wrong".
Forbes also said she would not have voted for equal marriage had she been an MSP at the time the bill was passed in 2014.
She has since offered a qualifed apology but she will be encouraged by a new poll of 1,001 SNP voters that found 28% preferred Forbes as the next leader, against 20% for Yousaf and 7% for Ms Regan. About a third were undecided.
There is still plenty to play for and the next four weeks will tell us a lot about the SNP and potentially the future of the UK.